<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>js string</title>
		<script>
			var str="你好,javascript";
			alert("长度是："+str.length);
			alert(str.big());
			str=str.toUpperCase();
			alert(str);
			
			var s3=String.fromCharCode(65,66,67,97,21016);
			alert(s3);
		</script>
	</head>
	<body>
	</body>
</html>